Elmore County, ID
The federal environmental record for Elmore County (population 29,724): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
14
federal cleanup sites
1
PFAS-detecting water systems
2
TRI facilities
2
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Mountain Home Air Force Base | Mountain Home | on the NPL | 08/30/1990 |
Drinking water: PFAS testing
Public water systems serving Elmore with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| MOUNTAIN HOME AIR FORCE BASE ID4200054 | PFHxA: 13 ng/L PFHxS: 10 ng/L PFPeA: 6.7 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
2 facilities in Elmore filed TRI reports for 2024, totalling 25k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| US DOD USAF MOUNTAIN HOME AFB | MOUNTAIN HOME AFB | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Naphthalene | 25k lb |
| US DOD USAF SMALL ARMS RANGE | MOUNTAIN HOME AFB | Lead | 535 lb |
Underground fuel tanks
EPA's UST Finder records 95 tank facilities in Elmore: 39 tanks in service and 204 closed. 33 fuel releases are on record, of which 2 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Elmore as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Elmore, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ATLANTA AREA MINESATLANTA
- EAST 16TH STREET MERCURY SPILLMOUNTAIN HOME
- MOUNTAIN HOME AIR FORCE BASEMOUNTAIN HOME
- MOUNTAIN HOME MERCURY SPILLMOUNTAIN HOME
- TALACHE MINEATLANTA
- USDA FS BOISE NF: MONARCH MINE STAMP MILLATLANTA
- USDA FS BOISE NF: MONARCH MINE STAMP MILLATLANTA
- USDA FS BOISE NF: RIVERSIDE CAMP SITEATLANTA
- USDOI BLM BLACK MESA DUMPGLENNS FERRY
- USDOI BLM CLARKS AIR SERVICE AIRSTRIPGLENNS FERRY
- USDOI BLM CLOVER HOLLOW ILLEGAL AIRSTRIPMOUNTAIN HOME
- USDOI BLM HAMMETT DUMPHAMMETT
- USDOI BLM REEDER AIRSTRIP #1GLENNS FERRY
- VOLCANO MINEFAIRFIELD